Lots of places mentioned here out west, We have done a few out west, if you find yourself in Jackson hole, try Gran Targhee, its on the backside of JH. The day we ventured there, we had excellent powder and a fantastic day (Except my brother in law who was the first patient at the newly opened Driggs Idaho Emergency Room). When we got back to the condo in JH everyone was sharing their day and those that went to Jackson Hole were grousing and complaining about conditions, while we were waist deep in gorgeous fluff. Word of advice, make sure the weather is clear since the mountain pass to get there can get closed down with any significant snow.
I am also a big fan of Mt. Tremblant if you are in the east. Great long cruisers, some nice steeps but can get very cold if that is an issue.